Comments on the incidence and natural history of gastric and duodenal ulcer.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D004381:Duodenal Ulcer / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010438:Peptic Ulcer Hemorrhage / Q000453:epidemiology*; D010439:Peptic Ulcer Perforation / Q000453:epidemiology*; D012737:Sex Factors; D012959:Socioeconomic Factors; D013276:Stomach Ulcer / Q000453:epidemiology*